In 1999, the family patriarch died, and 650 people, including many real estate executives and politicians, crowded his funeral at Marble Collegiate Church on Fifth Avenue.

But the drama was hardly put to rest. Freddy’s son, Fred III, spoke at the funeral, and that night, his wife went into labor with their son, who developed seizures that led to cerebral palsy. The Trump family promised that it would take care of the medical bills.

Then came the unveiling of Fred Sr.’s will, which Donald had helped draft. It divided the bulk of the inheritance, at least $20 million, among his children and their descendants, “other than my son Fred C. Trump Jr.”

Freddy’s children sued, claiming that an earlier version of the will had entitled them to their father’s share of the estate, but that Donald and his siblings had used “undue influence” over their grandfather, who had dementia, to cut them out.